ANSI/ ASME B16.5 class 300 threaded flange
ANSI/ASME B16.5 standard covers pressure,temperature,ratings,materials,dimensions,tolerances,marking, testing,and methods of designating openings for pipe flanges and flanged fittings.Threaded flange dimensions are covered in ANSI/ASME B16.5 class 300 for size NPS ½” to 24″.Threaded flange means the inner bore of a flange is thread,the shape of the threaded flange is like a slip on flange,so the threaded flange could be plate shape or with a hub for longer thread.
Dimensions of ANSI/ASME B16.5 class 300 threaded flange:
ANSI ASME B16.5 class 300 threaded flange dimensions
| Pipe | Flange Data | Hub | Raised Face | Drilling Data | Weight | |||||||
| Nominal Pipe Size | A | B | C | D | E | F | G | H | I | J | ||
| Outside Diameter | Overall Diameter | Counter-bore min | Flange Thickness min | Overall Length | Threaded length min | Hub Diameter | Face Diameter | Number of Holes | Bolt Hole Diameter | Diameter of Circle of Holes | kg/piece | |
| in mm |
in mm |
in mm |
in mm |
in mm |
in mm |
in mm |
in mm |
in mm |
in mm |
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| ½ | 0.840 21.30 | 3.750 95.20 | 0.930 23.60 | 0.560 14.20 | 0.880 22.30 | 0.620 15.70 | 1.500 38.10 | 1.380 35.00 | 4 | 0.620 15.70 | 2.620 66.55 | 0.64 |
| ¾ | 1.050 26.70 | 4.620 117.3 | 1.140 29.00 | 0.620 15.70 | 1.000 25.40 | 0.620 15.70 | 1.880 47.70 | 1.690 42.90 | 4 | 0.750 19.00 | 3.250 82.50 | 1.12 |
| 1 | 1.315 33.40 | 4.880 123.9 | 1.410 35.80 | 0.690 17.50 | 1.060 26.90 | 0.690 17.50 | 2.120 53.80 | 2.000 50.80 | 4 | 0.750 19.00 | 3.500 88.90 | 1.36 |
| 1¼ | 1.660 42.20 | 5.250 133.3 | 1.750 44.40 | 0.750 19.00 | 1.060 26.90 | 0.810 20.60 | 2.500 63.50 | 2.500 63.50 | 4 | 0.750 19.00 | 3.880 98.50 | 1.68 |
| 1½ | 1.900 48.30 | 6.120 155.4 | 1.980 50.50 | 0.810 20.60 | 1.190 30.20 | 0.880 22.30 | 2.750 69.85 | 2.880 73.15 | 4 | 0.880 22.30 | 4.500 114.3 | 2.49 |
| 2 | 2.375 60.30 | 6.500 165.1 | 2.500 63.50 | 0.880 22.30 | 1.310 33.20 | 1.120 28.40 | 3.310 84.00 | 3.620 91.90 | 8 | 0.750 19.00 | 5.000 127.0 | 2.87 |
| 2½ | 2.875 73.00 | 7.500 190.5 | 3.000 76.20 | 1.000 25.40 | 1.500 38.10 | 1.250 31.70 | 3.940 100.0 | 4.120 104.6 | 8 | 0.880 22.30 | 5.880 149.3 | 4.32 |
| 3 | 3.500 88.90 | 8.250 209.5 | 3.630 92.20 | 1.120 28.40 | 1.690 42.90 | 1.250 31.70 | 4.620 117.3 | 5.000 127.0 | 8 | 0.880 22.30 | 6.620 168.1 | 5.85 |
| 3½ | 4.000 101.6 | 9.000 228.6 | 4.130 104.9 | 1.190 30.20 | 1.750 44.40 | 1.440 36.50 | 5.250 133.3 | 5.500 139.7 | 8 | 0.880 22.30 | 7.250 184.1 | 7.34 |
| 4 | 4.500 114.3 | 10.00 254.0 | 4.630 117.6 | 1.250 31.70 | 1.880 47.70 | 1.440 36.50 | 5.750 146.0 | 6.190 157.2 | 8 | 0.880 22.30 | 7.880 200.1 | 9.61 |
| 5 | 5.563 141.3 | 11.00 279.4 | 5.690 144.5 | 1.380 35.00 | 2.000 50.80 | 1.690 42.90 | 7.000 177.8 | 7.310 185.7 | 8 | 0.880 22.30 | 9.250 234.9 | 12.3 |
| 6 | 6.625 168.3 | 12.50 317.5 | 6.750 171.4 | 1.440 36.50 | 2.060 52.30 | 1.810 45.90 | 8.120 206.2 | 8.500 215.9 | 12 | 0.880 22.30 | 10.62 269.7 | 15.6 |
| 8 | 8.625 219.1 | 15.00 381.0 | 8.750 222.2 | 1.620 41.10 | 2.440 61.90 | 2.000 50.80 | 10.25 260.3 | 10.62 269.7 | 12 | 1.000 25.40 | 13.00 330.2 | 24.2 |
| 10 | 10.75 273.0 | 17.50 444.5 | 10.88 276.3 | 1.880 47.70 | 2.620 66.55 | 2.190 55.60 | 12.62 320.5 | 12.75 323.9 | 16 | 1.120 28.40 | 15.25 387.3 | 34.1 |
| 12 | 12.75 323.8 | 20.50 520.7 | 12.94 328.7 | 2.000 50.80 | 2.880 73.15 | 2.380 60.45 | 14.75 374.6 | 15.00 381.0 | 16 | 1.250 31.70 | 17.75 450.8 | 49.8 |
| 14 | 14.00 355.6 | 23.00 584.2 | 14.19 360.4 | 2.120 53.80 | 3.000 76.20 | 2.500 63.50 | 16.75 425.4 | 16.25 412.7 | 20 | 1.250 31.70 | 20.25 514.3 | 69.9 |
| 16 | 16.00 406.4 | 25.50 647.7 | 16.19 411.2 | 2.250 57.15 | 3.250 82.50 | 2.690 68.30 | 19.00 482.6 | 18.50 469.9 | 20 | 1.380 35.00 | 22.50 571.5 | 88.1 |
| 18 | 18.00 457.2 | 28.00 711.2 | 18.19 462.0 | 2.380 60.45 | 3.500 88.90 | 2.750 69.85 | 21.00 533.4 | 21.00 533.4 | 24 | 1.380 35.00 | 24.75 628.6 | 109 |
| 20 | 20.00 508.0 | 30.50 774.7 | 20.19 512.8 | 2.500 63.50 | 3.750 95.2 | 2.880 73.15 | 23.12 587.2 | 23.00 584.2 | 24 | 1.380 35.00 | 27.00 685.8 | 134 |
| 24 | 24.00 609.6 | 36.00 914.4 | 24.19 614.4 | 2.750 69.85 | 4.190 106.4 | 3.250 82.50 | 27.62 701.5 | 27.25 692.2 | 24 | 1.620 41.10 | 32.00 812.8 | 201 |
Notes
- The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)
- Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).
- Weights are based on manufacturer’s data and are approximate.
Specifications of ANSI/ASME B16.5 flange:
Types of ANSI/ASME B16.5 forged flanges:
|
ANSI ASME B16.5 weld neck flange drawing |
Weld neck flange(WN flange) is circumferentially welded into the system at its neck which means that the integrity of the butt welded area can be easily examined by radiography.The bores of both pipe and flange match,which reduces turbulence and erosion inside the pipeline.The weld neck is therefore favoured in critical applications. |
|
ANSI ASME B16.5 blind flange drawing |
Blind flange is used to blank off pipelines,valves and pumps,it can also be used as an inspection cover.It is sometimes referred to as a blank flange. |
|
ANSI ASME B16.5 slip on flange drawing |
Slip on flange(SO flange) is slipped over the pipe and then fillet welded.Slip-on flanges are easy to use in fabricated applications. |
|
ANSI ASME B16.5 lap joint flange drawing |
Lap joint flange(LJ flange) is always used with either a stub end or taft which is butt welded to the pipe with the flange loose behind it.This means the stub end or taft always makes the face.The lap joint is favoured in low pressure applications because it is easily assembled and aligned.To reduce cost these flanges can be supplied without a hub and/or in treated,coated carbon steel. |
|
ANSI ASME B16.5 socket weld flange drawing |
Socket weld flange(SW flange) is counter bored to accept the pipe before being fillet welded.The bore of the pipe and flange are both the same therefore giving good flow characteristics. |
|
ANSI ASME B16.5 threaded flange drawing |
Threaded flange is referred to as either threaded or screwed.It is used to connect other threaded components in low pressure,non-critical applications.No welding is required. |
|
ANSI ASME B16.5 ring type joint flange drawing |
Ring type joint is a method of ensuring leak proof flange connection at high pressures.A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal.This jointing method can be employed on weld neck flanges,slip on flange and blind flanges. |
Materials of ANSI/ASME B16.5 class 300 threaded flange:
Carbon steel ANSI/ASME B16.5 threaded flange:
ASTM A105,A350 LF2,SS400,P235GH,P250GH,C22.8,Q235,20#,16Mn,etc.
Stainless steel ANSI/ASME B16.5 threaded flange:
ASTM A182 F304,F304L,F316,F316L,F321,F347,F310,F44,F51,etc.
Alloy steel ANSI/ASME B16.5 threaded flange:
ASTM A694 F42,F46,F52,F56,F60,F65,F70,A182 F5,F9,F91,F12,F11,F22,etc.
Related:
- ANSI/ASME B16.5 class 150 threaded flange
- ANSI/ASME B16.5 class 300 threaded flange
- ANSI/ASME B16.5 class 400 threaded flange
- ANSI/ASME B16.5 class 600 threaded flange
- ANSI/ASME B16.5 class 900 threaded flange
- ANSI/ASME B16.5 class 1500 threaded flange
- ANSI/ASME B16.5 class 2500 threaded flange
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